/*
 * Copyright 2017 ~ 2025 the original author or authors. James Wong <jameswong1376@gmail.com>>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.wl4g.infra.context.utils.web;

import static java.util.Objects.nonNull;
import static org.springframework.web.context.request.RequestContextHolder.getRequestAttributes;

import javax.annotation.Nullable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.constraints.NotBlank;

import org.springframework.web.context.request.ServletRequestAttributes;

import com.wl4g.infra.common.web.WebUtils2;

/**
 * {@link WebUtils3}
 *
 * @author James Wong <jameswong1376@gmail.com>>
 * @version v1.0 2020年5月21日
 * @since
 */
public abstract class WebUtils3 extends WebUtils2 {

    /**
     * Gets for request parameter.
     * 
     * @param name
     * @return
     */
    public static String getRequestParameter(String name) {
        final HttpServletRequest request = currentServletRequest();
        return nonNull(request) ? getRequestParam(request, name, false) : null;
    }

    /**
     * Gets for request header.
     * 
     * @param name
     * @return
     */
    public static String getRequestHeader(String name) {
        final HttpServletRequest request = currentServletRequest();
        return nonNull(request) ? getHeader(request, name, false) : null;
    }

    public static String getDefaultMergedParam(final @NotBlank String key, final @Nullable String defaultValue) {
        final HttpServletRequest request = currentServletRequest();
        return nonNull(request) ? WebUtils2.getDefaultMergedParam(request, null, key, defaultValue) : null;
    }

    public static HttpServletRequest currentServletRequest() {
        ServletRequestAttributes attr = (ServletRequestAttributes) getRequestAttributes();
        return nonNull(attr) ? attr.getRequest() : null;
    }

    public static HttpServletResponse currentServletResponse() {
        ServletRequestAttributes attr = (ServletRequestAttributes) getRequestAttributes();
        return nonNull(attr) ? attr.getResponse() : null;
    }

}